I will say that nipple stimulation for me was the way to go.
Have a pedicure. There are pressure points in your feet and legs that can cause labor.. Or look up some videos about the pressure points on YouTube and have your husband rub away.. Good luck!!
Best advice I can give you is to go to the ER. Whenever you feel discomforts. I wish I did with my 11 month old. Was past due a week. He weighted 9 pounds 7 ounces. Flipped last minutes due to stress of being in such a tight space. Had to deliver him with assistance of a vaccum. Too late for a C-section. Dr. told me I should of went in sooner. Yeah, now you tell me. Wait till at least 38 weeks though. You'll get braxting hicks if you haven't delivered by then. The nurses will pick up the contractions and call your Dr to see what he's going to have them do. Let your Dr know how uncomfy you feel.
Only routes i know is nipple stimulation and sex and staying active. There are old tales about pineapples and teas but from what I have heard they won't help unless you really are ready to go.